Just installed the Spohn boxed LCAs and adjustable tubular UCAs (listed for 2007-2014 trucks but fit these as well). I previously had Rancho 3/4" rubber spacers in the rear and replaced them with McBay Performance 1" alloy spacers as the Ranchos deformed pretty quickly. I have the autoleveling rear so we had to weld the existing brackets onto the new tubular upper arms. Otherwise all good! Now the truck is perfectly level with the front after installing Fox coil overs and tubular front UCAs. (I'd guess about 2.25" higher than stock front and 1.25" rear over stock).